lk/networking/ssh/reverse-ssh
2020-01-02 01:04:35 +01:00

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#From Laptop
> ssh -f -N -T -R[highport]:localhost:22 [server username]@[server public ip]
#From Server
> sudo ssh -p [highport] -D localhost:22 [laptop username]@localhost
## Example
From laptop, type:
> ssh -f -N -T -R9022:localhost:22 pi@89.216.113.126
Then from server, type:
> ssh -p 2210 [laptop username]@localhost
#Explanations
The -f switch feels out for connections in the background.
The -N switch is 'No commands', as you don't actually need to tunnel to anywhere.
The -T disables pseudo-tty allocation (???).
#Longterm
To set this up for permanent access, add this to the ~/.ssh/config:
> host remotehostname
> User remoteusername
> Hostname localhost
> Port 22222
'Remotehostname' can be anything, but 'remoteusername' must match.
For example
```
host hostelche
User hostelche
Hostname localhost
Port 9071
```
# Automatic startup
set file in /etc/network/if-up.d/phone-home
> chmod 755 /etc/network/if-up.d/phone-home
set file /etc/rc.local
> chmod 755 rc.local
Both files contain:
```
#!/bin/bash
sleep 60
ssh -f -N -T -R2049:localhost:22 pi@89.216.113.126
```